Pentair Water Treatment Equipment WFK-12

Turn off the pump at the circuit breaker

Relieve pressure in the system by allowing the water to cool

Remove the clamp and lid by gently tapping the clamp in a counter-clockwise direction

Remove debris and rinse out the basket

Replace the basket if it is cracked

Put the basket back into the housing, aligning the notch in the bottom of the basket with the rib in the bottom of the volute

Fill the pump pot and volute up to the inlet port with water

Clean the cover, O-ring, and sealing surface of the pump pot

Disconnect power to the pump at the circuit breaker

Disconnect the communication cable

Ensure suction and discharge valves are open

Check that the strainer pot temperature is cool to touch

Turn off the pump circuit breaker at the main panel

Drain the pump by removing the drain plugs

Ensure the pump is turned off and disconnected from power source

Gather necessary tools and replacement parts

Remove the rotating member of the shaft seal

Install the new rotating member of the shaft seal

Use silicone sealant on the metal portion of the replacement shaft seal before pressing into the seal plate.

Ensure the seal is fully seated and allow 24 hours for sealant to cure.

Impeller Preparation and Installation

Clean the impeller using light density soap and water.

Press the ceramic section of the seal into the impeller and wipe off the ceramic and carbon faces with a clean cloth.

Clean the motor shaft thread and the impeller insert.

Screw the impeller onto the motor shaft.

Screw in the impeller lock screw counter-clockwise and tighten to 25 in-lbs while holding the motor shaft with a wrench.